For gardeners and orchardists, it's the most wonderful flea market in the world. Not only that – most of the best stuff is free! MOFGA, the Maine Tree Crop Alliance, and Fedco will once again host the Seed Swap and Scionwood Exchange at MOFGA’s Common Ground Exhibition Hall in Unity. Please bring any seeds, scionwood or cuttings you have to share freely with others. In recent years we have given away scionwood from well over 200 fruit varieties. These contributions make the day a success. We'll supply labels, tape and markers, and we’ll be selling T-shirts, books, grafting supplies and rootstock. Admission is free. More details.

Organic and Sustainable Agriculture News

Could the diabetes epidemic be down to pollution?New Scientist - 9/15/2008.Ask why diabetes is epidemic in the 21st century and most people will point the finger at bad diet, laziness and obesity. According to a small but growing group of scientists, though, the real culprit is a family of toxic chemicals known as persistent organic pollutants, or POPs.

10 a.m. to 4 p.m., MOFGA’s Common Ground Education Center, Unity. Keynote speaker John Aber and a panel of farmers focus on weather- and climate-related changes farmers are experiencing. Includes open discussion on strategies for farmers to deal with changing climate. Information and registration.

Thursday, 10 a.m. to noon, Houlton Higher Education Center, Rm 110, 18 Military St, Houlton. Presented by Eric Sideman, Crop Specialist, MOFGA. Hosted by the Southern Aroostook Soil and Water Conservation District. The class is the second in a three-part high tunnel series funded by the Broad Reach Fund of the Maine Community Foundation. 1 pesticide credit is available through the class. A complementary lunch will be served. Pre-registration is requested. Contact the SASWCD at 532-2087 x 101 or angela.wotton@me.nacdnet.net

11 a.m., Bernard Osher Foundation Auditorium, Portland Museum of Art. Join this panel of experts on local sustainability in their discussion of the importance of public food forests, public orcharding, edible street trees, permablitzing and community gardens. A Community Collaboration between Portland Museum of Art and MOFGA. Free for PMA and MOFGA members ($10 for the general public). Schedule and details.

Two-part course designed to provide farmers with a strong background in soils, weeds and pest management, enabling them to make good management decisions. Lectures by Eric Sideman, MOFGA's organic crop specialist, and local farmers. Information and registration.

Saturday, 10 a.m. to 3 p.m. Locations: Palermo with Angus Deighan; Beech Hill Farm, Mount Desert with C.J. Walke; or Kermit Nickerson School, Swanville with Sean Murphy. Do you have old trees on your land that you would like to bring back into production? Learn how to renovate and tend your heritage trees. $50 non-members; $35 members. Information and registration.

6:30 p.m., Bernard Osher Foundation Auditorium, Portland Museum of Art. Hear Christy Hemenway from Gold Star Honeybees, Heather Spalding, MOFGA deputy director, and Fedco Seeds founder CR Lawn talk about our pollinators and the national and local issues that concern them and our food supply. Maine honey and mead tasting to follow. A Community Collaboration between Portland Museum of Art and MOFGA. Free for PMA and MOFGA members ($10 for the general public). Schedule and details.